Malicious PDF — malware analysis report

Static analysis result for SHA-256 16446d03a1a1aeae…

MALICIOUS

PDF

35.0 KB Created: 2020-08-20 09:03:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76726fcd9712c1548870c3c24e9bee23 SHA-1: afbf8a8000e1e0f881d75478c18a1e941b4d48d2 SHA-256: 16446d03a1a1aeae3dbf5e68ea94ad6032503cfb0da98bb4eac2aba334885353
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=be+koool+soft+cooling+soft+gel+sheets'. This redirector is likely used to obscure the final malicious destination. The document body, though partially corrupted, contains text related to 'cooling soft gel sheets' and the redirector URL, suggesting a lure for a scam or phishing campaign. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=be+koool+soft+cooling+soft+gel+sheets In PDF document text
    • http://files.keepitmovinginc.org/uploads/1/3/1/4/131453124/835882.pdfIn PDF document text
    • http://ropupejag.the5thbird.com/uploads/1/3/1/4/131483044/wutun-mubufujeguka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/2728/7451/files/fugupurotebemajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5021/2264/files/61868675626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/29211665659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/2201/2831/files/88800983135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/moy_games_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/92503783275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9958/6714/files/cr-_10s_pro_filament_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/63956013159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/21914697462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8825/5912/files/the_seekers_daniel_boorstin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/sinapaforalub.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C26 4948 bytes
SHA-256: 26ed261406043c2b43e0295bd8f18fedd4780edf139f9625167f75fdf632abff
font_01_sfnt_off00005d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D04 10012 bytes
SHA-256: 813060dd85b16bf2c476826904144bc2f4598994213a5a0712d7533db8d93491

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